Doorlock



April 6 ,1926.

w. R. SCHLAGE DOORLOCK 2 Sheets-Sheet 1 Filed March 12, 1925 Patented Apr. 6,1926. 7

"UNITED STATES WALTER B. SCHLAGE, OI FRANCISCO, CALH'OBNIL. A

noonnocx.

Application filed March 12, 1925. Serial 1T0. 14,897.

in my co-pen ing application entitled Dom-lock filed May 8, 1923, Serial No. 656,335.

Patent No. 1,489,675 shows a form of door lock which is actuated by an inner and an outer door knob and a push button carried by the inner knob which actuates amechanism whereby the outer knob is locked against rotation.

The co-pending application referred to.

discloses a specific form of door knob,

spindles, latch actuating mechanism, etc.,-

and the purpose of the present application is to provide a push button and a locking mechanism actuated thereby which operates in the same manner as the mechanism disclosed in Patent No. 1,489,675, but whichis particularly constructed to cooperate with the lock structure disclosed in the cO-pending applicatiom To fully describe the general lock structure and particularly the locking mechanism forming the subject matter of the present 1 application, reference will be made to the accompanying drawings, in which,

Fig. 1 is a central horizontal longitudinal section taken through the door lock;

Fig. 2 is a section taken on line 2-2 of Fig. 1, looking in the direction of the arrows;

Fig. 3 is a perspective view of the retractor guide;

Flg. 4 is a cross-section taken on line 4-4 of Fig. 1, looking in the direction of the arrows;

Fig. 5 is a cross-section taken on line 55 of Fig. 1, said section being partly broken away and also showing the locking bar and finger removed;

Fi 6 is a sectional detail view similar to Fig. 5 and taken on the same line, said view being also partly broken away and showing the retractor in the retracted position;

'Fig. 7 is a view similar to Fig. 1, the only difference being that it shows the locking bar partly advanced during the locking operation- 1 Fig. 8 is a perspective view of the ush button, the locking bar, and the loc ing fin er actuated thereby; t ig. 9 is a perspectlve view of the retracor;

Fig. 10 is a view similar to Figs. 1 and 7, but showing the locking bar and finger completely advanced to locking position;

Fig. 11 IS a detail section showing the locking bar and finger in an advanced position, but intermediate of the positions shown in Figs. 7 and 10;

Fig. 12 is a perspective view of the spring plunger;

Fig. 13 is a perspective view of one of the spindle sections.

The general lock structure shown in the drawings in this application are also fully disclosed and described in my co-pending application already referred to, but a brief description thereof is nevertheless thought necessary in order that the push button and locking mechanism actuated thereby and forming the subject matter of this application may be fully understood.

It might be stated that the lock structure here illustrated consists of a latching unit, generally indicated at A, and a latch actuating unit generally indicated at B. (See Fig. 1.) The unit B is contained in a cupshaped housing indicated at 2 and the unit A is contained in a cylindrical-shaped elongated housing 3. The unit A contains a latch or plunger 4 to which is, attached a retractor bar or plate 5. (See Fig. 6). The endof this plate is provided with lugs 6 and these are engaged by a pair of fingers 7 which form a part of a retractor generally shown in Fig. 9. The retractor is held within the cup-shaped housing 2 and is guided therein by a retractor guide, the general structure of which is shown in Fig. 3. In other words, the housing 2 contains a retractor guide, such as shown in Fig. 3, and a retractor such as shown in Fig. 9, and means are employed for imparting a reciprocal movement to the retractor so that the fingers 7 carried thereby may impart a reciprocal movement to the latching plate 5 and the latch 4 carried thereby. The reciprocal movement is imparted to the retractor by means of a pair of spindle members which are identical in construction, one of sheet metal and they are cylindrical and elongated, as shown. They are also slotted from end to end as indicated at 10 and this feature should particularly be noted as the locking mechanism forming the subject matter of the present application depends T u on the slotted structure of the spindles.

ach spindle is otherwise provided with a retracting lug, generally indicated at 11,

which engages a plate 12 inthe retractor. Each s indle carries a knob, as shown, and each spindle is turnable independent of the other. The lugs 11- of both spindles engage the plate 12 of the retractor and as the knobs are secured to the respective spindles, it can be seen that turnipg movement of either knob will impart a reciprocal movement to the retractor, which is transmitted through the fingers 7 and the plate 5 to reciprocate the latch or bolt 4.

The door is opened and closed in this manner. The real purpose of the present invention is to provide a locking mechanism whereby the outer knob and spindle may be locked against rotation so that the door cannot be opened by means of the outer knob. This is accomplished as follows:

The inner knob is indicated at 13 and the outer knob at 14. The inner knob is provided with a central opening 15 which forms a guide for a push button generally indicated at 16. The push button has a locking bar 17 attached thereto and this in turn carries a locking finger 18 which is actuated thereby. The locking bar and finger are perhaps best illustrated in Fig. 8. The bar is nothing more or less than a fiat strip of steel or other suitable metal on one end of which the push button 16 is secured. The other end is redured in size, as shown at 19, and it is also provided with a cam lug 20. The locking finger is also formed of flat metal and is bent around the reduced end 19 of the bar, as shown. It might also be stated that the locking finger is slidably mounted on the reduced end of the bar and that its movement is limited in one direction by the shoulder 21 and in the opposite direction by the cam lug 20. The finger 18 is provided with two offset shoulders such as shown at 22 and 23 and with a stop lug 24:, the function of which members will hereinafter be described.

By referring to Figs. 1, 7, 10 and 11, it will be noted that the spindle 8 carries a spring plunger which is perhaps best illustrated in Fig. 12. The spring plunger is in reality indicated at 25 and it is slidably mounted within a metal frame consisting of an end section 26, side bars 27 and 28, and

end sections 29. The side bars form a guide for the plunger 25 and they also serve the function of supporting a compression spring 30, which is interposed between the plunger 25 and the end sections 29. The side bar 27 is provided with an upwardly extendin lug, 31 which extends into the longitudina? slot 10 of the spindle section 8'. This lug serves the function of retaining the plunger mechanism against rotation within the spindle. Inward movement beyonda predetermined distance is limited by a lug 32 formed within the spindle. The lugs 31 and 32 cooperate to secure the plunger mechanism within the spindle 8 and that is their only function, as the plunger mechanism is otherwise frictionally secured by providing a tight fitj By again referring to Figs. 1 and 12, it will be seen that the end plate 26 is provided with a central opening 33 and that the plunger 25 is provided with a cup-shaped depression 34. The inner reduced end 19 of the locking bar 17 projects through the opening 33' and engages the cup-shaped depression of the plunger 25. The locking bar 17, together with the finger 18, normally assumes the position shown in Fig. 1 and it assumes the position shown in Fig. 10 when the outer knob is locked.

It was previously stated that the spindles were slotted from end to end, as shown at 10 in Fig. 13, and that this is particularly true of the spindle 8, and further that this was of considerable importance as the lock ing mechanism cooperates with the spindle 8 and as such depends upon the longitudinal slot 10.

In actual operation, the push button 16, bar 17 and finger 18 normally assume the position shown in Fig. 1. In this position either spindle may be rotated by means of its knob and the latch or bolt 4 may thus be retracted to open or close the door. It should be noted that the push butt-on extends outwardly beyond the knob when this position is assumed and that the outward movement of the buttton and the locking bar is limited by the lug 24 formed on the upper end of the finger 18, as the lug engages the outer face of a plate 38 which forms a closure for one end of the lock housing 2. This end plate 38 is best shown in Figs. 1 and 4. 7

By referring to Fig. 4 it will be noted that the end plate is slotted as at 39 to permit the finger 18 to project therethrough. It should also be noted that the slot 10 in the spindle 8 normally aligns with the slot 39 in the end plate 38 when the mechanism assumes the position shown in Fig. l and in View thereof it should be obvious that if it is desired to lock the outer knob and spindle against rotation, it is only necessary to push the locking bar 17 and the finger 18 inwardly in the direction of arrow a, as

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this would cause the shoulder 23 to pass into the slot 10 of the spindle and also into the slot 39. The end plate 38 is a stationary and fixed part of the lock housing and an interlock would thus be formed between the spindle and said plate which would prevent rotation of the spindle. Hence, when it is desired to lock the outer knob and spindle, it is only necessary to depress the push button 16, or, in other words, to push it inwardly. It is, however, also necessary to lock the push button, the bar 17 and the finger '18 against return movement when so depressed as they would otherwise immediately return to unlocked position due to the pressure of the spring 30 in the plunger mechanism. This is accomplished by means of the cam lug 20 and the retractor shown in Fig. 9; that is, inward movement of the locking bar and the finger 18 causes the-cam 20 to pass in under an end plate 40 forming a part of the retractor and the moment the cam passes beyond the end plate 40, it returns and seats itself behind the cam and thereby locks the push button, the bar 17 and the finger 18 against return movement. The locked position is fully shown in Fig. 10. In other words plate 40 of theretractor serves as a latch which cooperates with the lug 20 to secure the same when in looking position, and as the retractor may be reciprocated by means of either spindle, it is obvious that the plate 40 may be raised to release the cam lug 20 and thus permit the push button 16, the bar 17 and the finger 18 to return to normal position. If the outer spindle and knob have been locked by the forward movement of the finger, as shown in Fig. 10, it is obvious that plate 40 cannot be retracted to release the cam lug 20 by rotating the outer spindle and knob, as these are locked against rotation by the advanced position assumed by the locking finger. Hence, it would be impossible to 0 en the door by means of the outer knob. he inner knob, however, is not locked against rotation and it is therefore possible to release the locking mechanism and to open the door by means of the inner knob at all times. Hence, if it is desired to open the door from the inside, it. is accomplished by merely rotating the inner knob 13 and the spindle 9. Such rotation causes the lug 11 of the spindle to engage the plate 12 of the retractor and this is thus reeiprocated a sufiicient distance to elevate the plate 40 and thereby release the cam lug 20, thus permitting the push button, the locking bar 17 and the finger 18 to return to normal position, as shown in Fig., 1; said return movement being insured by the pressure'of the spring 30 in the plunger mechanism .and return movement beyonda redet ermined point is insured by the retaining lug 24 on" the upper end of the locking finger.

From the foregoing it can be seen that both knobs and spindles are free to rotate so that a door may be opened either from the interior or exterior of a room when the locking finger assumes the position shown in Fig. 1. Itwill also beseen that the outer knob and spindle are locked against rotation by means of the finger 18 when they assume the position shown in Fig. 10. Hence, a door cannot be opened from the exterior but from the interior only, This is as it should be as it is only ossible to lock the door from the interior ue to the fact that the push button is mounted in the inner knob. The inner spindle is never looked against rotation and if it is desired to unlock a door from the interior, it is accomplished by merely rotating the inner knob. This causes depresssion of the retracting member and as a consequence automatic return of the locking mechanism and the push button to normal position. It was previously stated that the locking finger. 18 had a limited sliding movement with relation to the bar 17 and that this sliding movement was limited in one direction by the cam lug 20 and in the other direction by means of the shoulder 21. This is also an important feature of the present invention as it positively insures release of the locking mechanism wheri the inner knob is turned.

It should be remembered that the finger 18 is interposed between the slot 39 in plate 38 and the slot 10 in the spindle 8 when a locking position is assumed. Hence, if the outer knob should be grasped and rotated in one direction, finger 18 would be pinched or held between the spindle and the slot in the plate 38. The outer knob and spindle would, of course, not rotate, but they could rotate, for instance, a distance of grief an inch or so, and this movement would be sufficient to pinch and hold the finger against retraction if the inner knob and spindle were rotated. If the inner knob and spindle were rotated under such a condition, bar 17 would move back a distance equal to the movement permitted by the shoulder 21 and the cam lug 20 would then assume the position shown in Fig. 11; that is, lug 20 would ride in under the plate 40 and the moment the looking finger was relieved of pressure, it would immediately return to normal or unlocked position due to the pressure of the spring 30. The sliding movement between the finger and the bar is provided for the purpose of preventing a person on the exterior from interfering with the lock-releasing mechanism which is mounted on the interior side of the attract the attention of a person inside of the room. Such person would naturally turn the inner knob 13 to release the locking mechanism and it would be released providing no pinching action was being exerted on the plate 18. If the person on the exterior should still be attempting to turn the knob, it is possible that plate 18 might be pinched or held so that it would not return when the locking mechanism was released from the interior, but the moment the outer knob is released or the turning pressure reversed, plate 18 would immediately be released and would return to normal position. Hence, there can be no real interference from the exterior.

lVhile certain features of the locking mechanism are more or less specifically illustrated, I wish itunderstood that various changes in form and proportion may be resorted to within the scope of the appended claims. I similarly wish it understood that the materials and finish of the several parts employed may be such as the experience and judgment of the manufacturer may dictate or various uses may demand.

Having thus described my invention, what I claim and desire to secure by Letters Patent is 1. In a lock of the character described a housing, a latch carried thereby, a divided spindle consisting of an outer and an inner section, said sections being turnable independent of each other, means on each spindle for imparting a reciprocal movement to the latch, and means carried by the inner spindle and movable to form an interlock between the outer spindle and the lock housing to prevent rotation of said outer spindle.

2. In a lock of the character described a housing, a latch carried thereby, a divided spindle consisting of an outer and an inner section, said sections being turnable independent of each other, means on each spindle for imparting a reciprocal movement to the latch, means carried by the inner spindle and movable to form an interlock between the outer spindle and the lock housing to prevent rotation of said outer spindle, and means actuated by rotation of the inner spindle for releasing said interlocking means.

3. In a lock of the character described a housing, a latch carried thereby, a divided spindle consisting of an outer and an inner section, said section being turnable independent of each other, means on each spindle for imparting a reciprocal movement to the latch, and a locking member reciprocally mounted in the inner spindle and movable into engagement with the outer spindle to secure the same against rotation.

4. In a lock of the character described a housing, a latch carried thereby, a divided spindle consisting of an outer and an inner section, said sections being turnable independent of each other, means on each spindle for imparting a reciprocal movement to the latch, and a locking member reciprocally mounted in the inner spindle and adapted to form an interlock between the outer spindle and the lock housing to prevent rotation of said outer spindle.

5. In a lock of the character described a housing, a latch carried thereby, a divided spindle consisting of an outer and an inner section, said sections being turnable independent of each other, means on each spindle or in'iparting a reciprocal movement to the latch, a locking member reciprocall mounted in the inner spindle and adapte to form an interlock between the outer spindle and the lock housing to prevent rotation of said outer spindle, and means actuated by rotation of the inner spindle for releasing said interlocking means.

6. In a lock of the character described a lock housing, a latch carried thereby, a divided spindle consisting of an outer and an inner spindle section, said sections being turnable independent of each other and the outer section having a slot formed in one end, means on each spindle for imparting a reciprocal movement to the latch, a stationary end plate in the lock housing and having a slot formed therein in alignment with the slot in the outer spindle section, and a member carried by the inner spindle and movable into the slotted end plate of the housing and the slotted end of the outer spindle to interlock the same and prevent rotation'of the outer spindle.

7. In a lock of the character described a lock housing, a latch carried thereby, a divided spindle consisting of an outer and an inner spindle section, said sections being turnable independent of each other and the outer section having a slot formed in one end, means on each spindle for imparting a reciprocal movement to the latch, a stationary end plate in the lock housing and having a slot formed therein in alignment with the slot in the outer spindle section, a locking bar reciprocally mounted in the inner spindle, a button on one end thereof through which inward movement may be imparted to said bar, a spring adapted to impart movement to the bar in the opposite direction, and a plate carried by the locking bar and adapted to move into the slotted end plate of the housing and the slotted end of the spindle to interlock the same and prevent rotation of the outer spindle.

8. In a lock of the character described a lock housing, a latch carried thereby, a divided spindle consisting of an outer and an inner spindle section, said sections being turnable independent of each other and the outer section having a slot formed in one end, means on each spindle for imparting a reciprocal movement to the latch, a stationary end plate in the lock housing and having a slot formed therein in alignment with the plate carried by the locking bar and ada tand adapte 'plate of the part movement ed to move into the slotted end plate of t e housing and the slotted end of thespindle to interlock the same vand prevent rotation of the outer indle, and means for locking the bar and tie plate when assuming said interlocked position.

9. In a lock of the character. described a lock housing, a latch carried thereby, a divided spindle consisting of an outer and an inner spindle section, said sections being turnable independent of each other and the outer section having a slot formed in one end,'means on each spindle for imparting a reciprocal movement to the latch, a stationary end plate in the lock housing and having a slot -formed therein in alignment with the slot in the outer spindle section, a locking bar reciprocally mounted in the-in: ner spindle, a button onone end thereof throu h which inward movement may be imparte to said bar, a spring adapted to imto the bar in the opposite late carried by the lockm bar to move into the slotte end housing and-the slotted end of direction, a

the spindle to interlock the same and prevent rotation of the outer spindle, means for locking the bar and the plate when assuming said interlocked position, and means for manually releasing said locking means.

10. In a lock of the character described va lock housing, a latch carried thereby, a

divided spindle consisting of an outer and van inner. spindle section, said sections being turnable independent of each other and the outer section having a slot formed in one end, means'on each spindle forimparti'ng a reciprocal movement to the latch, a stationary end plate in the lock housing and having a slot formed therein in alignment with the slot in the outer spindle section, a looking bar reciprocally mounted in the inner spindle, a button on one end thereof through which inward movement may be imparted to said bar, a s ring adapted to im art movement to the ar 1n the opposite irection, a plate carried by the locking bar and adapted to move into the slotted end late of the housing and the slotted end of the spindle to interlock the same and prevent rotation of the outer spindle, means for locking the bar and the plate when assuming said interlocked position, and means actuated by rotation of the inner knob for releasing said locking means.

WALTER R. SOHLAGE. 

